It isn't surprising. Two days ago I posted that the Grayscale unlocking was due and a good chance that we would see a btc drop. I even left a grand on the table for clover finance cause I didn't want to leave my money in overnight. I tethered up and now I have all my money with profits ready to reinvest. Tether up often in a bear market is my recommendation.
You can see another drop in the coming days. The usd is doing well right now, that's another indicator that btc and stocks will go in the opposite direction.